Oil burner



A. LARSEN.

OIL BURNER.

APPLICATION FILED OCT. 21, 1920.

Patented Jan. 17, 1922. N 3 SHEETS-SHEET I. w T

1 N VEN TOR. flaw/.0 A 42.55!

A TTORNE Y.

A. LARSEN.

OIL BURNER.

APPLICATION FILED OCT. 21, 1920.

Patented Jan. 17, 1922.

3 SHEETS-SHEET Z.

INVENTOR. ,43/1010 1,425.50.

A TTORNEY.

A. LARSEN.

OIL BURNER.

APPLICATION FILED OCT. 21. 1920.

m e w. m Hm N n m, ma 7H 1 &|| WLV 0 mm H hm k M m U M P.

ATTORNEY.

CII

UNITED STATES ARNOLD LARSEN, OF INDIANAPOLIS, INDIANA.

OIL BURNER.

Specification of Letters Patent. Patented J 511. 1'7, 1922,

Application filed October 21, 1920. Serial No. 418,522.

To all whom it may concern:

Be it known that I, ARNOLD Lansmv, a

citizen of the United States, residing at Indianapolis, in the county ofMarion and State of Indiana, have invented certain new and usefulImprovements in Oil Burners, of which the following is a specification.

This invention relates to oil burners, and is designed primarily for usein connection with boilers of steam propelled vehicles, although it willbe understood that it may be used for producing heat for variouspurposes. One feature of the invention is the provision of a pluralityof associated tubes and valves for controlling the passage of the fuelfrom a supply tank to the combustion chamber, said tubes being soarranged that the fuel will be vaporized before being discharged intothe combustion chamber.

A further feature of the invention is the provision of a burner soconstructed that back firing will be practically eliminated while at thesame time the most efficient passage for the fuel into the combustionchamber will be provided.

A further feature of the invention is the provision of a pilot soconstructed that a suflicient temperature will be maintained below thevaporizing tube to instantly vaporize the fuel when turned into saidtube, a minimum amount of fuel being used for keeping the vaporizingtube hot.

A further feature of the invention is the provision of means forremoving any collection of sediment at the ends of the fuel dischargenozzles.

Other objects and advantages will be hereinafter more fully set forthand pointed out in the accompanying specification.

In the accompanying drawings which are made a part of this application,

Figure 1 is a top plan view of the burner as applied to use inconnection with the boiler of a motor propelled vehicle,

Figure 2 is a sectional view thereof as seen on line 22 Figure 1, a

Figure 3 is a transverse sectional view through the burner as seen online 3-3 Figure 2,

Figure 4 is an enlarged longitudinal sectional view through the fuelconveying and vaporizing structure, and

Figure 5 is a sectional view as seen on line 55 Figure 4:.

Referring to the drawings in which similar reference numerals designatecorresponding parts throughout the several views,"1 indicates a boilerwhlch is in this instance shown as circular and is designed to be usedin connection with automobiles or similar steam propelled vehicles, andto the lower end of said boiler is attached a burner com prising acasing the upper end of said casing being open while'the lower portionthereof is provided with a tubular mixing tube 3' through which fuel islntroduced in the lower portion or mixing chamber of the casing.

T he interior of the casing 2 is provided with a flange a which isdesigned to support bars 5, said bars being spaced apart to form slots 6for the passage of the fuel from the lower portion of the casing. Inorder to prevent the bars 5 from becoming so heated that a back fire orexplosion of the fuel would ocour in the mixing chamber or the lower porformed of channel iron and the channels tion of the casing 2, said barsare preferably 1 filled with fire clay 7 or other heat resistingsubstance, consequently the lower portions of the bars will be preventedfrom reaching such a temperature as to ignite the fuel below the bars.

The fuel is conveyed from any suitable source of supply through a tube 8into a tubular vaporizing chamber 9, the fuel being vaporized whilepassing through the chamber 9, and is conveyed to a valve'lO through -apipe 11, said valve having a nozzle 12 thereon which discharges the fuelinto the outer open ends of the mixing tube 3 and from whence it passesinto the'casingQ below the bars 5, the fuel being properly commingledwith air as it passes through the mixing chamber. The valve 10 iscontrolled by a needle 13, said needle having a shoulder- 95 1% thereonwhich engages ashoulder 1 5 on the interior of the valve 10, saidshoulders being positioned a distance from the dis charge end of thenozzle, and to prevent any accumulation of sediment at the discharge endof the nozzle the needle 13 is provided with an extension 16 whichismore or less blunt at its outer end, and consequently removes anysediment that may collect in the discharge opening of the nozzle whenthe needle is turned inwardly its fulldistance.

The fuel to the pilot is conveyed from the same source as the fuel forthe burner properand is entered into a cylindrical chamber 17 through. apipe 18, the cylindrical chamber 17 extending longitudinally through thevaporizing chamber 9, and beyond one end thereof, the latter chamberbeing of less diameter than the vaporizing chamber so as to form a thinfilm clearance space entirely around the chamber 17, consequently thefuel will be maintained in a thin film so that it will be quicklyvaporized.

The fuel passing through the cylindrical chamber l7 is also spread intoa thin film said pilot burner being positioned immediatel below theheating chamber 9 and exten s longitudinally of the heating chamber andsubstantially from end to end thereof.

The open end of the pilot 22 has a mixing chamber 23 for proper] mixingair with the fuel as it is discharge from the nozzle 20. The pilotburner22 has a plurality of slots 24 through which the fuel passesbefore it is ignited. The heat from the pilot maintains the temperaturewithin the heating elements 9 and 17 at such a degree as to vaporize thefuel and also produces sufficient heat to pre vent water within theboiler from freezing during cold weather, and at the same time reducinconsumption of the fuel to a minimum. he pilot also serves to ignite thefuel entering between the slots 6 of the burner.

The bars 5 ma be very cheaply manufactured and the en s are rested uponthe flange 4 and secured thereto by rivets 25 or in any suitable manner.The casing portions of the burner may also be very chea ly manufacturedas it can be molded, if cesired, or the parts thereof may be made up ofsheet metal, if preferred. Consequently, the entire structure may bevery cheaply manufactured and will be"unusuall strong and durable, thefire clay entere in the chamber ortions of the bars 5 fully protectingthe bars from the-intense heat, consequently prolon 'ng the life of thebars.

T lie pipes 8 and 18 are provided with a valve 26 and 27 so that thefuel may be cut oil from either of the heatin from both of them, as maybe esired.

As best shown in Figure 4 the chamber 17 containing the fuel for thepilot is enclosed by the chamber 9 containing the fuel for the burnerproper, conse uently the heat for varizing the fuel in t e inner tubeorcham r 17 has to pass through the wall of the members or outer chamber9, consequently the chamber 9 is heated to such a high degree that whenthe raw fuel is admitted thereto by opening the valve 26, it will bethoroughly vaporized and practically instantly, or before itreaches thedischarge pipe 11. This obviates any possibility of the fuel beingdischarged into the mixing chamber in raw or unvaporized condition, andeliminates discharges of offensive smoke and odors.

Under ordinary usage the pilot remains lighted thereby maintaining sucha temperature that it requires but a minimum amount of time to increasethe steam pressure to the required capacity and all that is necessary toapply the burner to use is to open the valve 26 so that the fuel willpass into the vaporizing chamber 9 whereit is instantly vaporized, andpasses downwardly through the valve 10, thence upwardly between the bars5, the blaze from the pilot igniting the gaseous fuel as it passes abovethe bars.

It will likewise be seen that by employing the spaces between the barsas the openings for the passage of the fuel, a large burning surface isprovided, consequently an intense heat can be produced in a very shortspace of time. Furthermore, it will require less fuel to maintain theproper heat below the boiler after the maximum temperature has beenreached.

Having thus fully described my-said in- I vention, what I claim as newand desire to secure by Letters Patent, is:

'1. In a burner, a casing, a fuel mixing chamber in the lower portion ofsaid casing, a pilot burner extending transversely through the casing,and a plurality of bars channel-shaped in cross section above saidmixing chamber, said bars being spaced apart to form fuel openingstherebetween, said pilot displacing and forming a substitute for one ofsaidvbars.

2. In an oil burner, a casing having a fuel mixing chamber in the lowerportion thereof, a pilot burner in a plane above said mixing chamber,fuel conveying chambers above said pilot, and a plurality of barssubstantially channel-shaped in cross section in line with said pilotburner and spaced apart to form slots for the passage of the fuel fromthe lower portion of the casing, said pilot displacing one of said bars.

3. In an oil burner, a casing, a plurality of bars within the casing anddividing the interior of the casing into a mixing chamber and acombustion chamber, said bars being spaced apart to form passages forthe fuel from the mixing chamber, and heat resisting means on said barsto prevent the lower portions of said bars from reaching a high degreeof temperature.

4. In an oil burner, a casing, a plurality of bars extendingtransversely of the interior of the casing and spaced apart to form asit is entered in the outer tube and also vaporize the fuel in the innertube, and 15 valves for controlling the passage of the fuel from saidchambers into the burner.

In Witness whereof, I have hereunto set my hand and seal atIndianapolis, Indiana, this 18th day of October, A. D. nineteen hundred20 and twenty.

ARNOLD LARSEN. L. 5.

Witnesses:

CAREY S. FRYE, M. L. SHULER.

